Well, I have not discovered much in the way of health records, as that was not my angle. I have studied family history just because it interests me to see who is related to whom and how.
It also served the purpose of making dead, boring old history lessons come alive and be more meaningful. One of my ancestors was in the Civil War, and I still have the uniform buttons from his membership in the Grand Army of the Republic, a veterans' organization from that war.
Because of him, I learned of The Battle of Hanover Courthouse, in which he was a participant. That is a lesser-known of the battles, and I'd never heard of it in school. Having found that out, I was motivated to find out more about that battle, and wrote a Hub about it.
So, I'd say again that studying family history has made history in general more relevant.
It has been a fascinating study, and you learn that nearly everyone has some kind of skeleton in the closet. Way back when, it was not common for people to move very far from where they were born, so after a time they ran out of people to marry besides cousins. Imagine my surprise to discover on one of my lines, a woman who was second cousin twice removed from her own son!